单项选择题

Thecustomerintendstoinstalla7315-CR2intoap690frame.WhatshouldthepSeriestechnicalspecialisttellthecustomer?()

A.TheHMCisa19"formfactor.
B.TheHMCisa24"formfactor.
C.TheHMCrequiresa100-120voltpowerconnection.
D.TheHMCrequiresa200-240voltpowerconnection.
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